Use source shadow node state on clone (facebook#50773)

Summary:
Pull Request resolved: facebook#50773

With shadow node syncing enabled by default, whenever a shadow node has to be cloned, we can be guaranteed that the state on the shadow node will be the most recent state in most cases.

This change fixes state updates being ignored when cloning YogaLayoutableShadowNodes from a commit hook. Since the most recent state gets updated post commit, any clone reading the most recent state might miss state changes done within the commit.

Changelog: [Internal]

Reviewed By: rshest, cipolleschi

Differential Revision: D72315898

fbshipit-source-id: 5e14d03681dd1cc5686a649caa2e8c3685042cfa

Author: Nick Lefever

Diff for: packages/react-native/ReactCommon/react/renderer/core/ShadowNode.cpp

@@ -112,7 +112,9 @@ ShadowNode::ShadowNode(
           fragment.children ? fragment.children : sourceShadowNode.children_),
       state_(
           fragment.state ? fragment.state
-                         : sourceShadowNode.getMostRecentState()),
+                         : (ReactNativeFeatureFlags::useShadowNodeStateOnClone()
+                                ? sourceShadowNode.state_
+                                : sourceShadowNode.getMostRecentState())),
       orderIndex_(sourceShadowNode.orderIndex_),
       family_(sourceShadowNode.family_),
       traits_(sourceShadowNode.traits_) {